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/* cygserver_client.cc
Copyright 2001 Red Hat Inc.
Written by Egor Duda <deo@logos-m.ru>
This file is part of Cygwin.
This software is a copyrighted work licensed under the terms of the
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
details. */
#ifdef __OUTSIDE_CYGWIN__
#undef __INSIDE_CYGWIN__
#else
#include "winsup.h"
#endif
#ifndef __INSIDE_CYGWIN__
#define debug_printf printf
#define api_fatal printf
#include <stdio.h>
#include <windows.h>
#endif
#include <sys/socket.h>
#include <errno.h>
#include <unistd.h>
//#include "security.h"
#include "cygwin/cygserver_transport.h"
#include "cygwin/cygserver.h"
/* 0 = untested, 1 = running, 2 = dead */
int cygserver_running=CYGSERVER_UNKNOWN;
client_request_get_version::client_request_get_version () : client_request (CYGSERVER_REQUEST_GET_VERSION)
{
header.cb = sizeof (version);
buffer = (char *)&version;
}
#ifdef __INSIDE_CYGWIN__
void
client_request_get_version::serve (transport_layer_base *conn)
{
}
#endif
client_request_attach_tty::client_request_attach_tty () : client_request (CYGSERVER_REQUEST_ATTACH_TTY)
{
header.cb = sizeof (req);
buffer = (char *)&req;
req.pid = 0;
req.master_pid = 0;
req.from_master = NULL;
req.to_master = NULL;
}
client_request_attach_tty::client_request_attach_tty (DWORD npid, DWORD nmaster_pid, HANDLE nfrom_master, HANDLE nto_master) : client_request (CYGSERVER_REQUEST_ATTACH_TTY)
{
header.cb = sizeof (req);
buffer = (char *)&req;
req.pid = npid;
req.master_pid = nmaster_pid;
req.from_master = nfrom_master;
req.to_master = nto_master;
}
#ifdef __INSIDE_CYGWIN__
void
client_request_attach_tty::serve (transport_layer_base *conn)
{
}
#endif
client_request_shutdown::client_request_shutdown () : client_request (CYGSERVER_REQUEST_SHUTDOWN)
{
header.cb = 0;
buffer = NULL;
}
#ifdef __INSIDE_CYGWIN__
void
client_request_shutdown::serve (transport_layer_base *conn)
{
}
#endif
client_request::client_request (cygserver_request_code id)
{
header.req_id = id;
header.error_code = 0;
}
client_request::~client_request ()
{
}
client_request::operator class request_header ()
{
return header;
}
void
client_request::send (transport_layer_base *conn)
{
if (!conn)
return;
debug_printf("this=%p, conn=%p\n",this, conn);
ssize_t bytes_written, bytes_read;
debug_printf("header.cb = %ld\n",header.cb);
if ((bytes_written = conn->write ((char *)&header, sizeof (header)))
!= sizeof(header) || (header.cb &&
(bytes_written = conn->write (buffer, header.cb)) != header.cb))
{
header.error_code = -1;
debug_printf ("bytes written != request size\n");
return;
}
debug_printf("Sent request, size (%ld)\n",bytes_written);
if ((bytes_read = conn->read ((char *)&header, sizeof (header)))
!= sizeof (header) || (header.cb &&
(bytes_read = conn->read (buffer, header.cb) ) != header.cb))
{
header.error_code = -1;
debug_printf("failed reading response \n");
return;
}
debug_printf ("completed ok\n");
}
/* Oh, BTW: Fix the procedural basis and make this more intuitive. */
int
cygserver_request (client_request * req)
{
class transport_layer_base *transport;
if (!req)
return -1;
/* dont' retry every request if the server's not there */
if (cygserver_running==CYGSERVER_DEAD && req->header.req_id != CYGSERVER_REQUEST_GET_VERSION)
return -1;
transport = create_server_transport ();
/* FIXME: have at most one connection per thread. use TLS to store the details */
/* logic is:
* if not tlskey->conn, new conn,
* then; transport=conn;
*/
if (!transport->connect ())
{
delete transport;
return -1;
}
debug_printf ("connected to server %p\n", transport);
req->send(transport);
transport->close ();
delete transport;
return 0;
}
#if 0
BOOL
check_cygserver_available ()
{
BOOL ret_val = FALSE;
HANDLE pipe = CreateFile (pipe_name,
GENERIC_READ | GENERIC_WRITE,
FILE_SHARE_READ | FILE_SHARE_WRITE,
&sec_all_nih,
OPEN_EXISTING,
0,
NULL);
if (pipe != INVALID_HANDLE_VALUE || GetLastError () != ERROR_PIPE_BUSY)
ret_val = TRUE;
if (pipe && pipe != INVALID_HANDLE_VALUE)
CloseHandle (pipe);
return (ret_val);
}
#endif
void
cygserver_init ()
{
int rc;
if (cygserver_running==CYGSERVER_OK)
return;
client_request_get_version *req =
new client_request_get_version ();
rc = cygserver_request (req);
delete req;
if (rc < 0)
cygserver_running = CYGSERVER_DEAD;
else if (rc > 0)
api_fatal ( "error connecting to cygwin server. error: %d", rc );
else if (req->version.major != CYGWIN_SERVER_VERSION_MAJOR ||
req->version.api != CYGWIN_SERVER_VERSION_API ||
req->version.minor > CYGWIN_SERVER_VERSION_MINOR)
api_fatal ( "incompatible version of cygwin server.\n\
client version %d.%d.%d.%d, server version%ld.%ld.%ld.%ld",
CYGWIN_SERVER_VERSION_MAJOR,
CYGWIN_SERVER_VERSION_API,
CYGWIN_SERVER_VERSION_MINOR,
CYGWIN_SERVER_VERSION_PATCH,
req->version.major,
req->version.api,
req->version.minor,
req->version.patch );
else
cygserver_running = CYGSERVER_OK;
}
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